Eculizumab in Shiga-toxin Related Hemolytic and Uremic Syndrome Pediatric Patients - ECULISHU

Hemolytic Uremic Syndrome of Childhood Clinical Trial

— ECULISHU  

Official title:

Early Treatment With the Monoclonal C5 Antibody Eculizumab in Pediatric Patients Affected by Shiga-toxin Related Hemolytic and Uremic Syndrome: A Phase III Prospective Randomized Controlled Therapeutic Trial Versus Placebo

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT02205541
• Other study ID #: RC31/13/7052
• Secondary ID: PHRC 13-00602014
• Status: Completed
• Phase: Phase 3
• Start date: June 2015
• Est. completion date: June 2018

Study information

• Verified date: July 2019
• Source: University Hospital, Toulouse
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The investigators aim to perform the first controlled randomized prospective study using ECZ in pediatric STEC-HUS. This is of great interest as there is still no efficient specific therapy in that potentially devastating disease.

Furthermore, published data concerning the use of ECZ in STEC-HUS are controversial, reflecting statistical bias in retrospective or uncontrolled studies, thus emphasizing the need for prospective studies.

Description:

Hemolytic and uremic syndrome (HUS), characterized by thrombocytopenia, hemolytic anemia and acute renal failure (ARF), mainly affects children younger than 5 years old. Shiga-toxin (Stx) related HUS (STEC-HUS) is due to Stx secreting bacteria (mainly enterohemorrhagic Escherichia Coli strains). Acute phase of STEC-HUS is severe with at least 50% of affected children requiring dialysis, 20% presenting neurological involvement and 5% cardiac involvement. Mortality rates can reach 5% in pediatric series and long-term renal sequels have been reported in at least 30% of surviving patients. Apart from supportive care, no specific treatment (such as plasma exchange) has proven its efficacy in this life-threatening disease.

Recently, activation of the complement alternative pathway (CAP) has been demonstrated in STEC-HUS patients and experimental studies have highlighted that Stx induce CAP activation on human endothelial cells and platelet-leucocytes complexes, in addition to its direct cell toxicity inducing apoptosis, both processes ending up in microvasculature thrombosis. CAP activation has been demonstrated as the cause of atypical HUS (aHUS) and ECZ, a monoclonal C5 antibody, which inhibits the terminal complement complex (TCC) formation, can efficiently prevent evolution to end stage renal disease in aHUS patients. In 2011, Lapeyraque et al. reported its possible efficacy in 3 severe STEC-HUS pediatric patients. Nevertheless, in STEC-HUS, ECZ has only been used in uncontrolled studies, mostly during the 2011 German outbreak, with conflicting results. Considering the lack of therapy to prevent life-threatening complications and renal sequels in STEC-HUS and the logically expected efficacy of ECZ, controlled studies are mandatory. In recruiting centers, STEC-HUS patients with ARF will be proposed to enroll the trial with the exception of patients with multiorgan. After parental consent, patients will be randomized to receive either ECZ or a dextrose-based placebo in a single blinded fashion. According to the patient body weight, there will be 3 to 5 injections at day (D) 0, D7, D14, D21 and D28. According to the length of initial hospital stay, patients may have the remaining injections in the day ward of the recruiting center. Dosage of ECZ will be based on previous trials using ECZ in pediatric aHUS patients. We designed a single blinded study because patients treated with placebo who will develop severe multiorgan involvement will be switched to the ECZ arm. ECZ or placebo will be administrated intravenously as a 30-minute injection. In patients receiving hemodialysis, ECZ injection will be performed after a dialysis session. Before first injection, patients will receive a tetravalent meningococcal vaccine and an oral antibiotic prophylaxis to be continued up to 14 days after last injection.

This is a single blinded, phase III, randomized, multi-center controlled versus placebo clinical trial of eculizumab in STEC-HUS patients.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 100
• Est. completion date: June 2018
• Est. primary completion date: June 2018
• Accepts healthy volunteers: No
• Gender: All
• Age group: 1 Month to 18 Years

Eligibility

Inclusion Criteria:

• Pediatric patient (1 month-18 years old)

• Affected by STEC-HUS defined by :

• Thrombocytopenia (<150 000/mm3)

• Mechanic hemolytic anemia (Hemoglobin < 10g/dL, haptoglobin <LLN, lactate dehydrogenase (LDH) >upper limit of normal (ULN) and/or bilirubin > ULN, presence of schizocytes)

• ARF defined by an estimated Schwartz 2009 creatinin clearance <75ml/min/1,73m²

• With prodromal diarrhea and/or presence of an enterohemorrhagic strain of Escherichia Coli and/or identification of the Stx 1 or 2 genes in the stool sample or rectal swab

• Written consent of the 2 parents

• Female patients of childbearing potential must be practicing an effective, reliable and medically acceptable contraceptive regimen during the entire duration of the study and 5 months after the end of the participation.

Exclusion Criteria:

• Neonatal HUS

• Malignancy

• Known HIV infection

• Pregnancy or lactation

• Identified drug exposure-related HUS

• Infection-related HUS

• Known systemic lupus erythematosus or antiphospholipid antibody positivity or syndrome

• Patient already enrolled in a drug trial

• Patient with ongoing meningococcal infection

• Patient affected by aHUS or family history of aHUS

• STEC-HUS patient with severe multiorgan involvement at diagnostic:

• Neurological involvement (seizures, coma, focal deficit) with signs of microangiopathy on cerebral Magnetic Resonance Imaging.

• Cardiac involvement (cardiac failure, ischemic myocarditis, conduction or rhythm troubles)

• Digestive involvement (severe pancreatitis defined by lipasemia>500UI/L, severe hepatitis defined by transaminase >x10ULN and/or prothrombin time<60%, hemorrhagic colitis, bowel perforation, rectal prolapsus)

Related Conditions & MeSH terms

• Azotemia
• Hemolysis
• Hemolytic Uremic Syndrome of Childhood
• Hemolytic-Uremic Syndrome
• Syndrome

Intervention

Drug:
• Eculizumab
According to the patient body weight, there will be 3 to 5 injections at D0, D7, D14, D21 and D28. According to the length of initial hospital stay, patients may have the remaining injections in the day ward of the recruiting center. Dosage of ECZ will be based on previous trials using ECZ in pediatric aHUS patients. ECZ or placebo will be administrated intravenously as a 30-minute injection
• Placebo
According to the patient body weight, there will be 3 to 5 injections at D0, D7, D14, D21 and D28. ECZ or placebo will be administrated intravenously as a 30-minute injection

Locations

Country	Name	City	State
France	University Hospital	Amiens
France	University Hospital	Angers
France	University Hospital	Besançon
France	Pellegrin Hospital	Bordeaux
France	Morvan Hospital	Brest
France	University Hospital	Grenoble
France	Jeanne de Flandre Hospital	Lille
France	Mother and Child Hospital	Limoges
France	Women, Mother and Child Hospital	Lyon
France	La Timone Hospital	Marseille
France	University Hospital	Montpellier
France	Mother and Child Hospital	Nantes
France	Necker Hospital	Paris
France	Robert Debré Hospital	Paris
France	Trousseau Hospital	Paris
France	Anne de Bretagne University Hospital	Rennes
France	Purpan Children Hospital	Toulouse
France	Clocheville Hospital	Tours

Sponsors (1)

Lead Sponsor	Collaborator
University Hospital, Toulouse

Country where clinical trial is conducted

France, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	the duration in days of extrarenal epuration	Extrarenal epuration means peritoneal dialysis or hemodialysis, and is assessed at each visit.	From the inclusion date and assessed up to 13 months
Secondary	Number of adverse events as a measure of Safety and tolerance of treatment injections (ECZ or placebo)		At each injection (treatment visits 2, 3, 4, 5, 6 at respectively day 0, 7, 14, 21, 28) and at each follow-up visit (7, 8, 9 respectively at month 2, 7, 13)
Secondary	Adverse reactions related to the treatment (ECZ or placebo)		At each injection (treatment visits 2, 3, 4, 5, 6 at respectively day 0, 7, 14, 21, 28) and at each follow-up visit (7, 8, 9 respectively at month 2, 7, 13)
Secondary	Duration of Acute Renal Failure (ARF)	Duration of ARF will be evaluated as follow : urine output measurement, creatinin clearance estimated with the Schwartz 2009 assay (based on creatinin plasma levels), ionogram, proteinuria.	Inclusion Visit (1 at day -3 to -1 ), treatment period (visits 2, 3, 4, 5, 6 respectively at day 0, 7, 14, 21, 28), follow-up period (visits 7, 8, 9 respectively at month 2, 7, 13)
Secondary	Renal sequels	Renal sequels will be evaluated as follow : blood pressure, creatinin clearance, ionogram, proteinuria and microalbuminuria.	At 1, 6 and 12 months after last injection of ECZ (follow-up visits 7, 8, 9)
Secondary	Hematological abnormalities	Duration (in days) of the thrombocytopenia; Duration (in days) of the hemolytic anemia	Inclusion Visit (1 at day -3 to -1), treatment period (visits 2, 3, 4, 5, 6 respectively at day 0, 7, 14, 21, 28), follow-up period (visits 7, 8, 9 respectively at month 2, 7, 13)
Secondary	Blood parameters of Complement Alternative Pathway (CAP)	Blood parameters of CAP will be evaluated with plasmatic dosages of the complement components C3 and CD46.	Inclusion visit (1 at day -3 to -1), Treatment visits (3, 4, 5, 6 at day 7, 14, 21, 28), follow-up visit (7 at month 2)
Secondary	Inhibition of the Terminal Complement Complex (TCC)	Inhibition of the TCC will be evaluated trough the CH50 assay and plasmatic free ECZ levels.	Inclusion visit (1 at day -3 to -1), Treatment visits (3, 4, 5, 6 at day 7, 14, 21, 28), follow-up visit (7 at month 2)
Secondary	Incidence of extrarenal manifestations	Neurological involvement (seizures, coma, focal deficit); Cardiac involvement (cardiac failure, ischemic myocarditis, conduction or rhythm troubles); Digestive involvement (pancreatitis, hepatitis, hemorrhagic colitis, bowel perforation, rectal prolapsus)	Inclusion Visit (1 at day -3 to -1), treatment period (visits 2, 3, 4, 5, 6 respectively at day 0, 7, 14, 21, 28)
Secondary	Mortality		Inclusion Visit (1 at day -3 to -1), treatment period (visits 2, 3, 4, 5, 6 respectively at day 0, 7, 14, 21, 28), follow-up period (visits 7, 8, 9 respectively at month 2, 7, 13)